Well, if you have already submitted your move, and they haven't viewed the game yet, you can go back to it and click "Edit" near the top, and add a message. If they have already viewed the game (but not yet played) you cannot do that.
(gem) Træt af at sætte spillepladen op hver gang i sænke slagskib eller Spionage? Under "Game Editors" kan du gemme dine fortrukkende opsætninger. (pauloaguia) (vis alle tips)